.kcal file: how to open it on Windows

1 Windows app registers the .kcal extension. Install one of them to open the file with a double-click.

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  Killendar

  Encrypted calendar for Windows. Install or run portable. GPLv3. No account, no sync, no telemetry.

  Open source 1.4.0 94 ↓ ★ 10

Related guide: Change the default app for a file type in Windows